Setting Up SPI on your Raspberry pi

Problem 

You have a Serial Peripheral Interface (SPI) bus that you want to use with your Raspberry Pi. 

  Solution 

By default, Raspbian is not configured for the Raspberry Pi’s Serial Peripheral Interface interface (SPI) to be enabled. To enable it,  Use the Raspberry Pi Configuration tool that you will find on the main menu under Preferences, or on older versions of Raspbian, use the raspiconfig using the command:

$ sudo raspi-config

Then select Advanced, followed by Serial Peripheral Interface, and then Yes before rebooting your Raspberry Pi. After the reboot, SPI will be available. Serial Peripheral Interface allows serial transfer of data between the Raspberry Pi and peripheral devices, such as analog-to-digital converter (ADC) and port expander chips, among other devices. 

 Reference book Raspberry Pi Cookbook

 

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